Composer providing composition for Iris and son (7)
I believe the answer is:
rossini
'composer' is the definition.
(Italian composer Gioachino Rossini)
'composition for iris and son' is the wordplay.
I cannot really understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
'son' could be 'ss' (I've seen this in other clues) and 'ss' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'providing' is the link.
Can you help me to learn more?
(Other definitions for rossini that I've seen before include "Gioacchino ---, It. composer" , "Italian opera composer" , "Largo al factotum composer" , "he produced harmony" , "Barber of Seville writer" .)